2010 Cadillac Truck SRX AWD V6-3.0L Page 817
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
Engine running, observe the scan tool Rear Drive Clutch Status parameter. The scan tool should display TEMPORARILY LIMITED when
stationary.
Circuit/System Testing
Note: The rear drive clutch solenoid valve is calibrated with and is part of the rear differential clutch control module. Both components must be
replaced as a matched set.
Verify DTC C0402 is not set.
If the DTC is set, replace the K47 rear differential clutch control module/Q48 rear drive clutch solenoid valve assembly.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
Control Module References (See: Testing and Inspection/Programming and Relearning) for rear differential clutch control module replacement,
setup, and programming
C0403
DTC C0403
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptor
DTC C0403 62
- AWD Oil Filter Reverse Valve Stuck Open
Circuit/System Description
The differential clutch pump delivers hydraulic oil pressure to the rear drive clutch solenoid valve and the rear differential clutch solenoid valve.
The pump is mounted to the torque transfer device housing. The pressure of the system is calculated by the rear differential clutch control module
which monitors the differential clutch pump current levels. When the pressure reaches approximately 3200 kPa (464 psi), the rear differential clutch
control module determines that the system pressure has been obtained and deactivates the differential clutch pump. If a voltage is detected after a
predetermined time limit when the pump has been deactivated an error is detected. This condition indicates the pump is spinning backwards.
Conditions for Running the DTC
* The ignition is ON.
* Operating temperature range 0-80掳C (0-176掳F).
Conditions for Setting the DTC
The rear differential clutch control module detects voltage on the differential clutch pump control circuit 20 seconds after the pump has been
deactivated indicating the pump is spinning in reverse direction.
Action Taken When the DTC Sets
One or more of the following actions may occur:
* All-wheel drive (AWD) is disabled
* Service Rear Axle is displayed on the driver information center.
